* acl (named_acl.c) * cdr * cel * ccss * dnsmgr * dsp * enum * extconfig (config.c) * features * http * indications * logger * manager * plc * sounds * udptl These modules are now loaded at appropriate time by the module loader. Unlike loadable modules these use AST_MODULE_LOAD_FAILURE on error so the module loader will abort startup on failure of these modules. Some of these modules are still initialized or shutdown from outside the module loader. logger.c is initialized very early and shutdown very late, manager.c is initialized by the module loader but is shutdown by the Asterisk core (too much uses it without holding references). Change-Id: I371a9a45064f20026c492623ea8062d02a1ab97f
365 lines
9.2 KiB
C
365 lines
9.2 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2007, Digium, Inc.
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*
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* Steve Murphy <murf@digium.com> borrowed code from cdr,
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* Mark Spencer <markster@digium.com> and others.
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Custom SQLite3 CEL records.
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*
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* \author Adapted by Steve Murphy <murf@digium.com> from
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* Alejandro Rios <alejandro.rios@avatar.com.co> and
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* Russell Bryant <russell@digium.com> from
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* cdr_mysql_custom by Edward Eastman <ed@dm3.co.uk>,
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* and cdr_sqlite by Holger Schurig <hs4233@mail.mn-solutions.de>
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*
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*
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* \arg See also \ref AstCEL
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*
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*
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* \ingroup cel_drivers
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*/
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/*** MODULEINFO
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<depend>sqlite3</depend>
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<support_level>extended</support_level>
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***/
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#include "asterisk.h"
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#include <sqlite3.h>
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#include "asterisk/paths.h"
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#include "asterisk/channel.h"
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#include "asterisk/cel.h"
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#include "asterisk/module.h"
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#include "asterisk/config.h"
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#include "asterisk/pbx.h"
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#include "asterisk/logger.h"
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#include "asterisk/utils.h"
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#include "asterisk/cli.h"
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#include "asterisk/options.h"
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#include "asterisk/stringfields.h"
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#define SQLITE_BACKEND_NAME "CEL sqlite3 custom backend"
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AST_MUTEX_DEFINE_STATIC(lock);
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static const char config_file[] = "cel_sqlite3_custom.conf";
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static sqlite3 *db = NULL;
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static char table[80];
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/*!
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* \bug Handling of this var is crash prone on reloads
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*/
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static char *columns;
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static int busy_timeout;
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struct values {
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char *expression;
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AST_LIST_ENTRY(values) list;
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};
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static AST_LIST_HEAD_STATIC(sql_values, values);
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static void free_config(void);
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static int load_column_config(const char *tmp)
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{
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char *col = NULL;
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char *cols = NULL, *save = NULL;
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char *escaped = NULL;
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struct ast_str *column_string = NULL;
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if (ast_strlen_zero(tmp)) {
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ast_log(LOG_WARNING, "Column names not specified. Module not loaded.\n");
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return -1;
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}
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if (!(column_string = ast_str_create(1024))) {
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ast_log(LOG_ERROR, "Out of memory creating temporary buffer for column list for table '%s.'\n", table);
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return -1;
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}
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if (!(save = cols = ast_strdup(tmp))) {
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ast_log(LOG_ERROR, "Out of memory creating temporary buffer for column list for table '%s.'\n", table);
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ast_free(column_string);
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return -1;
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}
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while ((col = strsep(&cols, ","))) {
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col = ast_strip(col);
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escaped = sqlite3_mprintf("%q", col);
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if (!escaped) {
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ast_log(LOG_ERROR, "Out of memory creating entry for column '%s' in table '%s.'\n", col, table);
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ast_free(column_string);
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ast_free(save);
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return -1;
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}
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ast_str_append(&column_string, 0, "%s%s", ast_str_strlen(column_string) ? "," : "", escaped);
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sqlite3_free(escaped);
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}
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if (!(columns = ast_strdup(ast_str_buffer(column_string)))) {
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ast_log(LOG_ERROR, "Out of memory copying columns string for table '%s.'\n", table);
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ast_free(column_string);
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ast_free(save);
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return -1;
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}
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ast_free(column_string);
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ast_free(save);
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return 0;
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}
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static int load_values_config(const char *tmp)
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{
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char *val = NULL;
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char *vals = NULL, *save = NULL;
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struct values *value = NULL;
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if (ast_strlen_zero(tmp)) {
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ast_log(LOG_WARNING, "Values not specified. Module not loaded.\n");
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return -1;
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}
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if (!(save = vals = ast_strdup(tmp))) {
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ast_log(LOG_ERROR, "Out of memory creating temporary buffer for value '%s'\n", tmp);
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return -1;
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}
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while ((val = strsep(&vals, ","))) {
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/* Strip the single quotes off if they are there */
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val = ast_strip_quoted(val, "'", "'");
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value = ast_calloc(sizeof(char), sizeof(*value) + strlen(val) + 1);
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if (!value) {
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ast_log(LOG_ERROR, "Out of memory creating entry for value '%s'\n", val);
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ast_free(save);
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return -1;
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}
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value->expression = (char *) value + sizeof(*value);
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ast_copy_string(value->expression, val, strlen(val) + 1);
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AST_LIST_INSERT_TAIL(&sql_values, value, list);
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}
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ast_free(save);
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return 0;
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}
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static int load_config(int reload)
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{
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struct ast_config *cfg;
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struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
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struct ast_variable *mappingvar;
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const char *tmp;
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if ((cfg = ast_config_load(config_file, config_flags)) == CONFIG_STATUS_FILEMISSING || cfg == CONFIG_STATUS_FILEINVALID) {
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ast_log(LOG_WARNING, "Failed to %sload configuration file. %s\n",
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reload ? "re" : "", reload ? "" : "Module not activated.");
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return -1;
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} else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
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return 0;
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}
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if (reload) {
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free_config();
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}
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if (!(mappingvar = ast_variable_browse(cfg, "master"))) {
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/* Nothing configured */
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ast_config_destroy(cfg);
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return -1;
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}
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/* Mapping must have a table name */
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if (!ast_strlen_zero(tmp = ast_variable_retrieve(cfg, "master", "table"))) {
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ast_copy_string(table, tmp, sizeof(table));
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} else {
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ast_log(LOG_WARNING, "Table name not specified. Assuming cel.\n");
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strcpy(table, "cel");
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}
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/* sqlite3_busy_timeout in miliseconds */
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if ((tmp = ast_variable_retrieve(cfg, "master", "busy_timeout")) != NULL) {
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if (ast_parse_arg(tmp, PARSE_INT32|PARSE_DEFAULT, &busy_timeout, 1000) != 0) {
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ast_log(LOG_WARNING, "Invalid busy_timeout value '%s' specified. Using 1000 instead.\n", tmp);
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}
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} else {
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busy_timeout = 1000;
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}
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/* Columns */
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if (load_column_config(ast_variable_retrieve(cfg, "master", "columns"))) {
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ast_config_destroy(cfg);
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free_config();
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return -1;
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}
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/* Values */
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if (load_values_config(ast_variable_retrieve(cfg, "master", "values"))) {
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ast_config_destroy(cfg);
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free_config();
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return -1;
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}
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ast_verb(3, "Logging CEL records to table '%s' in 'master.db'\n", table);
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ast_config_destroy(cfg);
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return 0;
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}
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static void free_config(void)
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{
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struct values *value;
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if (db) {
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sqlite3_close(db);
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db = NULL;
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}
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if (columns) {
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ast_free(columns);
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columns = NULL;
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}
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while ((value = AST_LIST_REMOVE_HEAD(&sql_values, list))) {
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ast_free(value);
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}
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}
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static void write_cel(struct ast_event *event)
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{
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char *error = NULL;
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char *sql = NULL;
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if (db == NULL) {
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/* Should not have loaded, but be failsafe. */
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return;
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}
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ast_mutex_lock(&lock);
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{ /* Make it obvious that only sql should be used outside of this block */
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char *escaped;
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char subst_buf[2048];
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struct values *value;
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struct ast_channel *dummy;
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struct ast_str *value_string = ast_str_create(1024);
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dummy = ast_cel_fabricate_channel_from_event(event);
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if (!dummy) {
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ast_log(LOG_ERROR, "Unable to fabricate channel from CEL event.\n");
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ast_free(value_string);
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ast_mutex_unlock(&lock);
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return;
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}
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AST_LIST_TRAVERSE(&sql_values, value, list) {
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pbx_substitute_variables_helper(dummy, value->expression, subst_buf, sizeof(subst_buf) - 1);
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escaped = sqlite3_mprintf("%q", subst_buf);
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ast_str_append(&value_string, 0, "%s'%s'", ast_str_strlen(value_string) ? "," : "", escaped);
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sqlite3_free(escaped);
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}
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sql = sqlite3_mprintf("INSERT INTO %q (%s) VALUES (%s)", table, columns, ast_str_buffer(value_string));
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ast_debug(1, "About to log: %s\n", sql);
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dummy = ast_channel_unref(dummy);
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ast_free(value_string);
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}
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if (sqlite3_exec(db, sql, NULL, NULL, &error) != SQLITE_OK) {
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ast_log(LOG_ERROR, "%s. SQL: %s.\n", error, sql);
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sqlite3_free(error);
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}
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if (sql) {
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sqlite3_free(sql);
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}
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ast_mutex_unlock(&lock);
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return;
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}
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static int unload_module(void)
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{
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ast_cel_backend_unregister(SQLITE_BACKEND_NAME);
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free_config();
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return 0;
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}
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static int load_module(void)
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{
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char *error;
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char filename[PATH_MAX];
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int res;
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char *sql;
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if (load_config(0)) {
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return AST_MODULE_LOAD_DECLINE;
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}
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/* is the database there? */
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snprintf(filename, sizeof(filename), "%s/master.db", ast_config_AST_LOG_DIR);
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res = sqlite3_open(filename, &db);
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if (res != SQLITE_OK) {
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ast_log(LOG_ERROR, "Could not open database %s.\n", filename);
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free_config();
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return AST_MODULE_LOAD_DECLINE;
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}
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sqlite3_busy_timeout(db, busy_timeout);
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/* is the table there? */
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sql = sqlite3_mprintf("SELECT COUNT(*) FROM %q;", table);
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res = sqlite3_exec(db, sql, NULL, NULL, NULL);
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sqlite3_free(sql);
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if (res != SQLITE_OK) {
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/* We don't use %q for the column list here since we already escaped when building it */
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sql = sqlite3_mprintf("CREATE TABLE %q (AcctId INTEGER PRIMARY KEY, %s)", table, columns);
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res = sqlite3_exec(db, sql, NULL, NULL, &error);
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sqlite3_free(sql);
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if (res != SQLITE_OK) {
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ast_log(LOG_WARNING, "Unable to create table '%s': %s.\n", table, error);
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sqlite3_free(error);
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free_config();
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return AST_MODULE_LOAD_DECLINE;
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}
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}
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if (ast_cel_backend_register(SQLITE_BACKEND_NAME, write_cel)) {
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ast_log(LOG_ERROR, "Unable to register custom SQLite3 CEL handling\n");
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free_config();
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return AST_MODULE_LOAD_DECLINE;
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}
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return AST_MODULE_LOAD_SUCCESS;
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}
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static int reload(void)
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{
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int res = 0;
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ast_mutex_lock(&lock);
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res = load_config(1);
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ast_mutex_unlock(&lock);
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return res;
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "SQLite3 Custom CEL Module",
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.support_level = AST_MODULE_SUPPORT_EXTENDED,
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.load = load_module,
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.unload = unload_module,
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.reload = reload,
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.load_pri = AST_MODPRI_CDR_DRIVER,
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.requires = "cel",
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);
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